<!-- TETRAGONAL P4 SPACE GROUPS -->
<input type="checkbox" name="spacegroups[]" id="sg_P422" value="P422"> P422<br/>
<input type="checkbox" name="spacegroups[]" id="sg_P4122" value="P4122"> P4122<br/>
<input type="checkbox" name="spacegroups[]" id="sg_P4222" value="P4222"> P4222<br/>
<input type="checkbox" name="spacegroups[]" id="sg_P4322" value="P4322"> P4322<br/>
<input type="checkbox" name="spacegroups[]" id="sg_P4212" value="P4212"> P4212<br/>
<input type="checkbox" name="spacegroups[]" id="sg_P41212" value="P41212"> P41212<br/>
<input type="checkbox" name="spacegroups[]" id="sg_P42212" value="P42212"> P42212<br/>
<input type="checkbox" name="spacegroups[]" id="sg_P43212" value="P43212"> P43212<br/>
<!--
<input type="checkbox" name="spacegroups[]" id="sg_P42212A" value="P42212A"> P42212A<br/>
-->